催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (10): 1043-1050.

• 研究论文 • 上一篇    下一篇

负载型CeO2-ZrO2固溶体的性能及其在甲烷燃烧Pd催化剂中的应用

王晓红1,2,卢冠忠1*,郭耘1,乔东升1,张志刚1,郭杨龙1,李春忠2   

  1. 1 华东理工大学工业催化研究所结构可控先进功能材料及其制备教育部重点实验室, 上海 200237; 2 华东理工大学超细材料制备与应用教育部重点实验室, 上海 200237
  • 收稿日期:2008-10-25 出版日期:2008-10-25 发布日期:2008-10-25

Properties of CeO2-ZrO2 Solid Solution Supported on Si-Modified Alumina and Its Application in Pd Catalyst for Methane Combustion

WANG Xiaohong1,2, LU Guanzhong1*, GUO Yun1, QIAO Dongsheng1, ZHANG Zhigang1, GUO Yanglong1, LI Chunzhong2   

  1. 1 Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China; 2 Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
  • Received:2008-10-25 Online:2008-10-25 Published:2008-10-25

PDF

930

被引次数

20

摘要： 以硅改性的氧化铝为载体,用反相微乳液法合成了负载型的CeO2-ZrO2固溶体(Ce-Zr-O/Si-Al2O3), 用低温氮吸附、X射线衍射、程序升温还原、拉曼光谱和X射线光电子能谱等方法对Ce-Zr-O/Si-Al2O3的织构性能、热稳定性和储放氧性能等进行了表征. 结果表明,负载后的CeO2-ZrO2晶相与负载前相比没有变化,但热稳定性和在低温下的放氧能力及总储氧量明显提高. 作为甲烷燃烧Pd催化剂的载体, Ce-Zr-O/Si-Al2O3的性能明显优于CeO2-ZrO2, Si-Al2O3和机械混合物CeO2-ZrO2+Si-Al2O3. 使用0.2%Pd/10%Ce-Zr-O/Si-Al2O3为催化剂时,甲烷90%转化率时的温度仅为345 ℃, 比负载在其它载体上的Pd催化剂低175 ℃.

关键词: 负载型氧化铈-二氧化锆固溶体, 硅改性氧化铝, 钯催化剂, 催化活性, 甲烷燃烧

Abstract: CeO2-ZrO2 supported on Si-modified alumina was prepared by the reverse mic roemulsion method. The crystalline phase of Ce-Zr-O on Si-Al2O3 was the s ame as that of unsupported CeO2-ZrO2, and the thermal stability and oxygen storage/release capacity were improved. With the 0.2%Pd/10%Ce-Zr-O/Si-Al2O 3 catalyst, T90 for methane combustion was only 345 ℃, which was 17 5 ℃ lower than that of Pd supported on other supports.

Key words: supported ceria-zirconia solid solution, silicon-modified alumina, palladium catalyst, catalytic activity, methane combustion